Method for refining dicyclopentadiene

Patent metadata

Field	Value
Publication number	US-9783469-B2
Application number	US-201514962512-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Dec 26, 2008
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A first method for refining dicyclopentadiene of the present invention is characterized in that the method separates and recovers dicyclopentadiene by distilling the crude dicyclopentadiene that contains dicyclopentadiene and is obtained by removing a C5 fraction and a BTX fraction from the reaction product obtained by dimerization reaction of the cracked gasoline by-produced in an ethylene plant that uses as feed stock a C2 fraction, a C3 fraction and a C4 fraction. A second method for refining dicyclopentadiene of the present invention is characterized in that the dicyclopentadiene-containing fraction refined by distillation is brought into contact with an inert gas or a hydrocarbon gas having 1 to 3 carbon atoms.

First claim

The invention claimed is:

1. A method for improving a hue of a dicyclopentadiene-containing distillation fraction comprising:
gas-liquid contacting of a first dicyclopentadiene-containing distillation fraction with a hydrocarbon gas having 1 to 3 carbon atoms; and
recovering a second dicyclopentadiene-containing distillation fraction,
wherein the gas-liquid contacting is performed in a distillation tower with its theoretical number of stages set at 10 to 30, the first dicyclopentadiene-containing distillation fraction is fed from a tower top of the distillation tower, and the hydrocarbon gas having 1 to 3 carbon atoms is fed from a tower bottom of the distillation tower.

2. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the first dicyclopentadiene-containing distillation fraction is 200 or more in terms of APHA and the hue of the second dicyclopentadiene-containing distillation fraction is 100 or less in terms of APHA.

3. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the first dicyclopentadiene-containing distillation fraction exceeds 100 in terms of APHA and the hue of the second dicyclopentadiene-containing distillation fraction is 60 or less in terms of APHA.

4. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the flow rate of the first dicyclopentadiene-containing distillation fraction and the flow rate of the hydrocarbon gas having 1 to 3 carbon atoms into the distillation tower are set so the volume ratio of the gas to the first distillation fraction is 50 to 200.

5. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hydrocarbon gas having 1 to 3 carbon atoms is methane.

6. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the first dicyclopentadiene-containing distillation fraction is a product obtained by distilling a reaction product from a dimerization reaction of a cracked gasoline.

7. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 6 , wherein the cracked gasoline is the cracked gasoline by-produced in an ethylene plant that uses as feed stock a C2 fraction, a C3 fraction and a C4 fraction.

8. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the first dicyclopentadiene-containing distillation fraction contains dicyclopentadiene in a content of 85 to 99% by mass and comprises cyclopentadiene and methylcyclopentadiene in a sum content of 0.1 to 10% by mass.

9. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the first dicyclopentadiene-containing distillation fraction exceeds 100 in terms of APHA and the hue of the second dicyclopentadiene-containing distillation fraction is 100 or less in terms of APHA.

10. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the second dicyclopentadiene-containing distillation fraction is 60 or less in terms of APHA.

11. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the first dicyclopentadiene-containing distillation fraction is 200 or more in terms of APHA and the hue of the second dicyclopentadiene-containing distillation fraction is 60 or less in terms of APHA.

12. The method for improving a hue of a dicyclopentadiene-containing distillation fraction according to claim 1 , wherein the hue of the first dicyclopentadiene-containing distillation fraction is 200 or more in terms of APHA and the hue of the second dicyclopentadiene-containing distillation fraction is 50 or less in terms of APHA.

Assignees

• Jx Nippon Oil & Energy Corp
• Jx Nippon Chemical Texas Inc

Inventors

• Takeshita Takaaki
• Omata Takeshi
• Suzuki Takashi
• Morikita Takashi
• Mori Satoshi

Classifications

• B01D3/343

  the substance being a gas · CPC title

• C10G50/00 Primary

  Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation · CPC title

• C07C2603/68

  Dicyclopentadienes; Hydrogenated dicyclopentadienes · CPC title

• C07C7/04

  by distillation · CPC title

• C10G55/04

  including at least one thermal cracking step · CPC title